OPMs bring new opportunities to MEG but also come with new challenges. With increasing spread and sufficiently large systems becoming available, interference suppression becomes an important subject for many labs doing OPM-MEG. Traditionally used algorithms for interference suppression like signal space separation (SSS) do not work well for OPM-MEG [1]. Several promising alternatives have been...
Narrowband gamma oscillations in the primary visual cortex (V1) have been shown to depend on spatial features and colour in visual stimuli of gratings and uniformly coloured patches [1,2]. In invasive studies, natural images and movies have also been shown to induce these oscillations [1,3]. In non-invasive studies, in contrast, the responses to natural stimuli have been reported to be...
Optically pumped magnetometers (OPMs) present an alternative sensor technology for magnetoencephalography (MEG) to cryogenic systems, allowing for flexible, wearable arrays with reduced sensor-to-scalp distances [1]. However, despite rapid progress, current systems have fewer measurement channels (<200) compared to the ~300 used in cryogenic systems. The potential increase in measured signal...
Multivariate pattern analysis (MVPA) is a well-established method in functional neuroimaging, commonly applied to fMRI, MEG, and EEG data to classify spatial patterns of brain activity associated with different objects or experimental conditions. Optically pumped magnetometer (OPM)-based MEG systems have the potential to enhance MVPA performance, as they are theoretically shown to offer...
